As far as I know, Image alignment just finds the best fit given two images of the same scene.
Whereas Image rectification, with regards to stereo vision, warps the images so that the epipolar lines are all on the same level. Essentially all common pixels between the two images are warped to be on the same y axis.
My question is, what is the difference between Image Alignment and Image Rectification, given a pair of images, when doing stereo correspondence?
If I were to find the disparity between two images, how is image alignment different to image rectification?